©Karina Mayoral, Luis Rajmil, Marta Murillo, Olatz Garin, Angels Pont, Jordi Alonso, Joan Bel, Jacobo Perez, Raquel Corripio, Gemma Carreras, Javier Herrero, Jose-Maria Mengibar, Dolors Rodriguez-Arjona, Ulrike Ravens-Sieberer, Hein Raat, Vicky Serra-Sutton, Montse Ferrer. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 12.11.2019.
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